Tea

Publication Title: 
Canadian Journal of Gastroenterology = Journal Canadien De Gastroenterologie

Globally, people are struggling with obesity. Many effective, nonconventional methods of weight reduction, such as herbal and natural dietary supplements, are increasingly being sought. Fat burners are believed to raise metabolism, burn more calories and hasten fat loss. Despite patient perceptions that herbal remedies are free of adverse effects, some supplements are associated with severe hepatotoxicity.

Author(s): 
Yellapu, Radha K.
Mittal, Vivek
Grewal, Priya
Fiel, Mariaisabel
Schiano, Thomas
Publication Title: 
The American Journal of Clinical Nutrition

BACKGROUND: There is limited literature on the contributors to isoprostane metabolite 2,3-dinor-5,6-dihydro-15-F(2t)-isoprostane (15-F(2t)-IsoP-M) compared with F(2)-isoprostanes (F(2)-IsoPs) as an oxidative stress biomarker. OBJECTIVE: The objective of this study was to investigate whether plasma concentrations of antioxidants, urinary excretion rates of polyphenols, and antioxidants in food and dietary supplements are attributable to both urinary F(2)-IsoP and 15-F(2t)-IsoP-M concentrations.

Author(s): 
Dorjgochoo, Tsogzolmaa
Gao, Yu-Tang
Chow, Wong-Ho
Shu, Xiao-Ou
Yang, Gong
Cai, Qiuyin
Rothman, Nathaniel
Cai, Hui
Li, Honglan
Deng, Xinqing
Franke, Adrian
Roberts, L. Jackson
Milne, Ginger
Zheng, Wei
Dai, Qi
Publication Title: 
Toxicological Sciences: An Official Journal of the Society of Toxicology

Studies in our laboratory have concentrated on further understanding the mechanism by which chemicals induce cancer and the means to prevent or retard this process. Recent investigations have revolved around the role of oxidative stress and oxidative damage in the induction of cancer by nongenotoxic carcinogens. Hepatocarcinogenic compounds including selective chlorinated hydrocarbons appeared to induce oxidative stress in the liver. This oxidative stress and oxidative damage in turn may be responsible for the tumor-promoting activity of these compounds.

Author(s): 
Klaunig, J. E.
Kamendulis, L. M.
Publication Title: 
Hong Kong Medical Journal = Xianggang Yi Xue Za Zhi / Hong Kong Academy of Medicine

Unorthodox (non-traditional or alternative) medicinal practices have been expanding very rapidly in western countries. Modern physicians, scientists, and non-traditional medicine practitioners now must join forces to promote evidence-based medicine to benefit patients. Green tea extracts are among the most widely used ancient medicinal agents, while androgens are probably the oldest drugs used in a purified form in traditional Chinese medicine.

Author(s): 
Liao, S.
Publication Title: 
BMC musculoskeletal disorders

BACKGROUND: Osteoporosis is a major health problem in postmenopausal women. Evidence suggests the importance of oxidative stress in bone metabolism and bone loss. Tea consumption may be beneficial to osteoporosis due to its antioxidant capability. However, lack of objective data characterizing tea consumption has hindered the precise evaluation of the association between tea ingestion and bone mineral density in previous questionnaire-based epidemiological studies.

Author(s): 
Shen, Chwan-Li
Chyu, Ming-Chien
Yeh, James K.
Felton, Carol K.
Xu, Ke T.
Pence, Barbara C.
Wang, Jia-Sheng
Publication Title: 
BMC complementary and alternative medicine

BACKGROUND: Evidence suggests that both green tea polyphenols (GTP) and Tai Chi (TC) exercise may benefit bone health in osteopenic women. However, their safety in this population has never been systematically investigated. In particular, there have been hepatotoxicity concerns related to green tea extract. This study was to evaluate the safety of 24 weeks of GTP supplementation combined with TC exercise in postmenopausal osteopenic women, along with effects on quality of life in this population.

Author(s): 
Shen, Chwan-Li
Chyu, Ming-Chien
Pence, Barbara C.
Yeh, James K.
Zhang, Yan
Felton, Carol K.
Doctolero, Susan
Wang, Jia-Sheng
Publication Title: 
Osteoporosis international: a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA

Postmenopausal women with osteopenia received green tea polyphenols (GTP) supplement and/or Tai Chi exercise for 6 months. Bone turnover biomarkers, calcium metabolism, and muscle strength were measured. This study showed that GTP supplementation and Tai Chi exercise increased bone formation biomarkers and improved bone turnover rate. Tai Chi exercise increased serum parathyroid hormone. GTP supplementation, Tai Chi exercise, and the combination of the two all improved muscle strength in postmenopausal women with osteopenia.

Author(s): 
Shen, C.-L.
Chyu, M.-C.
Yeh, J. K.
Zhang, Y.
Pence, B. C.
Felton, C. K.
Brismée, J.-M.
Arjmandi, B. H.
Doctolero, S.
Wang, J.-S.
Publication Title: 
BMC musculoskeletal disorders

BACKGROUND: Osteoporosis is a major health problem in postmenopausal women. Evidence suggests the importance of oxidative stress in bone metabolism and bone loss. Tea consumption may be beneficial to osteoporosis due to its antioxidant capability. However, lack of objective data characterizing tea consumption has hindered the precise evaluation of the association between tea ingestion and bone mineral density in previous questionnaire-based epidemiological studies.

Author(s): 
Shen, Chwan-Li
Chyu, Ming-Chien
Yeh, James K.
Felton, Carol K.
Xu, Ke T.
Pence, Barbara C.
Wang, Jia-Sheng
Publication Title: 
BMC complementary and alternative medicine

BACKGROUND: Evidence suggests that both green tea polyphenols (GTP) and Tai Chi (TC) exercise may benefit bone health in osteopenic women. However, their safety in this population has never been systematically investigated. In particular, there have been hepatotoxicity concerns related to green tea extract. This study was to evaluate the safety of 24 weeks of GTP supplementation combined with TC exercise in postmenopausal osteopenic women, along with effects on quality of life in this population.

Author(s): 
Shen, Chwan-Li
Chyu, Ming-Chien
Pence, Barbara C.
Yeh, James K.
Zhang, Yan
Felton, Carol K.
Doctolero, Susan
Wang, Jia-Sheng
Publication Title: 
Osteoporosis international: a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA

Postmenopausal women with osteopenia received green tea polyphenols (GTP) supplement and/or Tai Chi exercise for 6 months. Bone turnover biomarkers, calcium metabolism, and muscle strength were measured. This study showed that GTP supplementation and Tai Chi exercise increased bone formation biomarkers and improved bone turnover rate. Tai Chi exercise increased serum parathyroid hormone. GTP supplementation, Tai Chi exercise, and the combination of the two all improved muscle strength in postmenopausal women with osteopenia.

Author(s): 
Shen, C.-L.
Chyu, M.-C.
Yeh, J. K.
Zhang, Y.
Pence, B. C.
Felton, C. K.
Brismée, J.-M.
Arjmandi, B. H.
Doctolero, S.
Wang, J.-S.

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